Abstract:
PROBLEM TO BE SOLVED: To provide a control device for a hybrid vehicle capable of suppressing abnormal noise and vibration from a power diving mechanism caused by fluctuation of torque output from an engine.SOLUTION: When an engine is operated (step S11: YES), a control device sets pressing torque Tr to have a larger value in driving of a supercharger (step S13: YES) than in non-driving of the supercharger (step S13: NO) (step S24).
Abstract:
PROBLEM TO BE SOLVED: To enhance controllability of a motor, and to make vehicle behavior more appropriate.SOLUTION: In a drive device controlling a motor by using a filtered current FIb obtained by performing low-pass filter processing for attenuating frequency components equal to or more than a cut-off frequency Fc to a charge and discharge current Ib of a battery detected by a current sensor, when a number of rotation Nm of the motor is out of a resonance number-of-rotation region of a circuit including a step-up converter (a region from a lower limit number-of-rotation N1 to an upper limit number-of-rotation N2) (S110), a predetermined frequency Fc1 is set to a cut-off frequency Fc (S120). On the other hand, when the number of rotation Nm of the motor is within the resonance number-of-rotation region (S110), a predetermined frequency Fc2 or a predetermined frequency Fc3, both of which are lower than the predetermined frequency Fc1, is set to the cut-off frequency Fc (S130-S150).
Abstract:
PROBLEM TO BE SOLVED: To improve fuel consumption of a hybrid vehicle while controlling unpleasantness to a driver by abnormal noise.SOLUTION: An operation line L is set based on a shift position SP and a brake pedal position BP, from a plurality of operation lines L1-L4 and LS1-LS12 in which a degree of avoidance of an abnormal noise generation region from a fuel consumption optimal operation line becomes smaller as a degree to which travel of the vehicle is restricted becomes greater. The target drive point of an engine is set by using the set operation line L, and torque commands Tm1* and Tm2* of motors MG1 and MG2 are set, and the engine and the motors MG1 and MG2 are controlled. As a result, the unpleasantness given to a driver by abnormal noises such as the booming noise and the rattle can be controlled, and also the fuel consumption of the vehicle can be improved.
Abstract:
PROBLEM TO BE SOLVED: To protect a secondary batteries and a boost converter.SOLUTION: A temporary output limit Wtmp1 is set based on a battery temperature Tb and a remaining capacity SOC of a battery (S110), and a temporary output limit Wtmp2 is set to obtain predetermined power Wref when a refrigerant temperature Tw is not higher than a predetermined temperature Tref for the boost converter. When the refrigerant temperature Tw exceeds the predetermined temperature Tref, the temporary output limit Wtmp2 is set so that power becomes smaller than the predetermined power Wref and it becomes smaller as the refrigerant temperature Tw is higher (S120). A smaller value of the temporary output limits Wtmp1 and Wtmp2 is set as an output limit Wout (S130). Two motors, the booster converter and an engine are controlled so that required torque is output from a drive shaft within a range of the set output limit Wout. Thus, the battery and the boost converter can be protected.
Abstract:
PROBLEM TO BE SOLVED: To detect more accurately a variation of an air-fuel ratio of each cylinder of an internal combustion engine of a plurality of cylinders while acquiring power required for traveling. SOLUTION: When the dispersion of an air-fuel ratio of each cylinder of an engine is detected, power acquired by subtracting smaller power between prescribed power α and battery output restriction Wout from required vehicle power Pd* is set as required engine power Pe* (S140), and a rotational frequency of the engine is reduced in comparison with the case that the variation of the air-fuel ratio is not detected by controlling the engine and two motors by using Pe*. By this, the variation of the air-fuel ratio of each cylinder of the engine can be detected accurately during traveling while outputting required torque Tr* required for traveling. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To maintain a hybrid vehicle in a desired travel situation, while protecting an electric storage means. SOLUTION: This controller (100) for the hybrid vehicle (10) includes the first rotary electric machine, the second rotary electric machine, an internal combustion engine (200), a power transmission mechanism (300) including the first rotary element (303), the second rotary element (301) and the third rotary element (306), a lock means (400), and the electric storage means (12), and is constituted to switch a transmission mode between a continuously variable transmission mode and a fixed transmission mode. The controller includes a determination means for determining the propriety of transiting the electric storage means to an overcharge state by electric power generation by the first rotary electric machine, based on a rotation speed of the first rotary electric machine, when a lock request is generated to the effect that the transmission mode should be switched from the continuously variable transmission mode to the fixed transmission mode, and a prohibition means for prohibiting the switching of the transmission mode to the fixed transmission mode, when the transition of the electric storage means to the overcharge state is determined. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a control device of a hybrid vehicle which can appropriately suppress transitional exceeding of an input/output limit value etc. of a battery. SOLUTION: The control device of the hybrid vehicle is suitably applied for the hybrid vehicle which includes first and second motor generators, a battery and an engine. A control means restricts variation of the engine demanded driving force so that a power value by power input/output at least in either of the first and second motor generators accompanying a change of the engine demanded driving force may become within the input/output limit value of the battery. Thereby change of engine output can be appropriately restricted within the input/output limit value of the battery, and performance degradation of the battery can be suppressed. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent an engine from stopping more frequently than needed and to prevent the rotational frequency of a sun gear connected to a first MG from becoming excessively high. SOLUTION: The first MG is connected to the sun gear, and an automatic transmission is connected to a ring gear. An engine is connected to a carrier. When the rotational frequency NR of the ring gear is a negative value, the rotating direction of the ring gear is reverse to the rotating direction in the operating state of the engine. An ECU executes a program including a step (S102) of controlling the automatic transmission to start formation of a gear step when shift operation to D position or R position is done (YES in S100); and a step (S106) of controlling the engine to stop when the stop condition that a gear step is in the process of formation and the rotational frequency NR of the ring gear is a negative value of the engine is satisfied (YES in S104). COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent the rotational frequency of a sun gear connected to a first MG from becoming excessively high. SOLUTION: The first MG is connected to the sun gear of a power dividing mechanism. An automatic transmission is connected to a ring gear. An engine is connected to a carrier. An ECU executes a program including: a step (S102) of controlling an automatic transmission to start formation of a forward gear step or a backward gear step when the shift operation from N position to D position or from N position to R position is performed (YES in S100); a step (S104) of determining whether or not the engine is started; and a step (S112) of controlling the engine to start ignition when the engine rotational frequency NE becomes larger than a threshold in the process of forming a gear step (YES in S110) in the case where starting of the engine is decided (YES in S102). COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To make a rotation rate of a rotary electric machine not to become excessively large during sudden deceleration of a vehicle. SOLUTION: An ECU executes a program which includes; a step for detecting an accelerator opening (S100); a step for detecting a stroke amount of a brake pedal (S110); a step for detecting a rotation rate NR of a sun gear to which a first MG is connected, and a ring gear of a power dividing mechanism having a carrier to which an engine is connected (S120); and a step to execute processing to restrict a load factor of an engine to an upper value KLH or below, when both accelerator operation and brake operation are performed and vehicle speed decreases rapidly (YES at S130), or in other words when the rotation rate of the ring gear decreases rapidly without falling of the rotation rate NE of the engine (S140). COPYRIGHT: (C)2008,JPO&INPIT